Can I grow this in a garden without sand?

It prefers sandy, well-draining soil and will likely struggle in heavy clay or rich garden loam.

Does it need fertilizer?

No, it is adapted to low-nutrient soils and excessive fertilizer can actually weaken the plant.

Guide botanique

Marram grass.

Ammophila arenaria

Prononciation am-oh-FILL-uh ar-eh-NAIR-ee-uh

Aussi appelée Ammophila arenaria, European beach grass, European beachgrass, Marram, marram grass, sea matgrass

Marram grass is a hardy, dune-stabilizing plant that thrives in sandy, coastal environments. It is famous for its ability to trap blowing sand and build up dunes along the shore. You will mostly see this plant outdoors in natural landscapes rather than as a houseplant.

En un coup d'œil

Niveau d'entretien: Facile
Type de plante: Perennial grass
Lumière: Full sun
Lumière en intérieur: Soleil direct
Arrosage: Tous les 7 à 14 jours
Taille adulte: 3 feet
Croissance: Rapide
Rusticité: USDA 4 à 9
Floraison: Mid to late summer

Entretien

This grass needs full sun and sandy, well-draining soil to stay healthy. Watch for signs of rot if the soil stays wet for too long, as it prefers dry conditions. It is best left to grow in its natural, rugged environment.

Arrosage: Water only during extreme drought once established.
Engrais: It rarely needs fertilizer in its natural sandy habitat.
Taille: Trim back dead foliage in late winter or early spring.
Rempotage: Only repot if the plant becomes severely root bound in a container.
Sol: Sandy, poor soil
pH du sol: 6.0 to 8.0
Température: -25 à 35°C
Humidité: 40 à 70%
Résistance à la sécheresse: Élevée
Durée de vie: Perennial, typically 10 plus years
Résistance aux chevreuils et lapins: Élevée

Signes qu'il faut rempoter

Roots growing out of drainage holes
Stunted growth
Center of the clump dying out

Sécurité

Humains: The plant is not toxic, but the sharp leaf edges can cause minor skin abrasions.
Enfants: The sharp, serrated edges of the leaves can cut delicate skin, so keep it away from play areas.
Allergènes de contact: The stiff, sharp leaf blades can cause mechanical skin irritation if handled without gloves.
Allergènes aéroportés: The pollen may cause mild seasonal allergic reactions in sensitive individuals.
Comestibilité: This grass is not considered edible for humans.

Comment l'identifier

Tall, stiff, blue green blades
Forms dense, spreading clumps
Cylindrical, wheat like flower spikes
Deep, extensive root system

Hauteur: 0,6 à 1,2m
Envergure: 0,3 à 0,6m
Feuilles: blue-green, grey-green, evergreen
Fleurs: pale-brown, straw, 10 à 25cm

Problèmes courants

Rust — Fungal spores appear as orange or brown pustules on the foliage during humid weather.

La cultiver

Multiplication: division, seed
Quand planter: spring, autumn
Hivernage: Leave the foliage standing through winter to protect the crown, then trim back in early spring before new growth appears.
En pot: It is not well-suited for containers as it requires significant root space to thrive.

Division

1. Dig up a mature clump in early spring.
2. Use a sharp spade to divide the root mass into smaller sections.
3. Replant immediately in sandy soil.

Group this with other salt-tolerant coastal plants to create a resilient, low-maintenance dune garden.

Bonnes associations

Eryngium maritimum — They share similar requirements for sandy, coastal conditions.
Armeria maritima — This low-growing perennial provides a nice contrast to the tall grass.

Espèces similaires

Ammophila breviligulata — This is the North American counterpart that serves the same ecological role.

Science

Famille: Poaceae
Genre: Calamagrostis
Ordre: Poales
Classe: Liliopsida
Région d'origine: Coastal regions of Europe and North Africa.
Préservation: It is a vital species for coastal protection and is often protected in dune habitats.

It survives by trapping wind-blown sand with its leaves, which encourages the growth of the dune around the plant.

Intérêt pour la faune: nesting material, erosion control
Pollinisateurs: abeilles, papillons
Utilisations: dune stabilization, ornamental grass, coastal landscaping

Au fil des saisons

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Floraison

Fructification

Feuillage

Repères écologiques

Salinité: 8/9
Réaction du sol: 7/9
Lumière: 8/9
Température: 5/9
Humidité: 2/9
Nutriments: 1/9

Taxonomie vérifiée avec le GBIF.

Ce qu'on demande souvent

Can I grow this in a garden without sand?: It prefers sandy, well-draining soil and will likely struggle in heavy clay or rich garden loam.
Does it need fertilizer?: No, it is adapted to low-nutrient soils and excessive fertilizer can actually weaken the plant.

D'où vient le nom

The genus name Calamagrostis comes from the Greek words for reed and grass, while arenaria refers to its preference for sandy habitats.

Bon à savoir

It is also known as Marram grass.
The deep, extensive root system can reach several meters into the sand.
It thrives in nutrient-poor, salty environments where most plants fail.

Aussi dans

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Cette page est un guide général. Pocket Botanist diagnostique les problèmes directement à partir d'une photo de ta plante, adapte l'arrosage à sa luminosité et te prévient quand il faut t'en occuper.

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Ce guide a été généré par IA et vérifié avec la taxonomie du GBIF. Il s'agit d'informations générales, et non de conseils horticoles ou vétérinaires. Découvre comment nous concevons ces guides.